Answer :
Final answer:
The mass of the rock on the triple-beam balance is approximately 317 grams or 0.317 kilograms.
Explanation:
To find the mass of the rock, we need to consider the balancing equation of a triple-beam balance. The equation is given by (7/7/2m₁ + 1/2/3 m₂ + 1/3 m = 317 g). The riders on the three beams represent the masses of each beam. By rearranging the terms in the equation and converting grams to kilograms, we can determine the mass of the rock to be approximately 0.317 kg or 317 g.
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